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<pre><span class="sourceLineNo">001</span>package frc3128.EventManager;<a name="line.1"></a>
<span class="sourceLineNo">002</span><a name="line.2"></a>
<span class="sourceLineNo">003</span>import frc3128.Util.DebugLog;<a name="line.3"></a>
<span class="sourceLineNo">004</span>import java.util.Vector;<a name="line.4"></a>
<span class="sourceLineNo">005</span><a name="line.5"></a>
<span class="sourceLineNo">006</span>/**<a name="line.6"></a>
<span class="sourceLineNo">007</span> * <a name="line.7"></a>
<span class="sourceLineNo">008</span> * @author Noah Sutton-Smolin<a name="line.8"></a>
<span class="sourceLineNo">009</span> */<a name="line.9"></a>
<span class="sourceLineNo">010</span>public class ListenerManager {<a name="line.10"></a>
<span class="sourceLineNo">011</span>    private static Vector eventList = new Vector();<a name="line.11"></a>
<span class="sourceLineNo">012</span>    private static Vector keyList = new Vector();<a name="line.12"></a>
<span class="sourceLineNo">013</span><a name="line.13"></a>
<span class="sourceLineNo">014</span>    private static void verifyNoDuplicate(Event e, int key) {<a name="line.14"></a>
<span class="sourceLineNo">015</span>        for(int i = 0; i &lt; eventList.size(); i++)<a name="line.15"></a>
<span class="sourceLineNo">016</span>            if((Event) eventList.elementAt(i) == e)<a name="line.16"></a>
<span class="sourceLineNo">017</span>                if(((Integer) ListenerManager.keyList.elementAt(i)).intValue() == key)<a name="line.17"></a>
<span class="sourceLineNo">018</span>                    DebugLog.log(DebugLog.LVL_WARN, "ListenerManager", "Duplicate event/key pair was added to the ListenerManager!");<a name="line.18"></a>
<span class="sourceLineNo">019</span>    }<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>    /**<a name="line.21"></a>
<span class="sourceLineNo">022</span>     * Adds an Event and key to the Listener system. This has the effect of <a name="line.22"></a>
<span class="sourceLineNo">023</span>     * triggering the Event once whenever the key is invoked.<a name="line.23"></a>
<span class="sourceLineNo">024</span>     * <a name="line.24"></a>
<span class="sourceLineNo">025</span>     * @param event the Event to be added to the ListenerManager<a name="line.25"></a>
<span class="sourceLineNo">026</span>     * @param key   the String key with which the Event should be associated<a name="line.26"></a>
<span class="sourceLineNo">027</span>     */<a name="line.27"></a>
<span class="sourceLineNo">028</span>    public static void addListener(Event event, String key) {<a name="line.28"></a>
<span class="sourceLineNo">029</span>        DebugLog.log(DebugLog.LVL_DEBUG, "ListenerManager", "Added " + event.toString() + " to " + key);<a name="line.29"></a>
<span class="sourceLineNo">030</span>        addListener(event, key.hashCode());<a name="line.30"></a>
<span class="sourceLineNo">031</span>    }<a name="line.31"></a>
<span class="sourceLineNo">032</span>    <a name="line.32"></a>
<span class="sourceLineNo">033</span>    /**<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * Adds an Event and key to the Listener system. This has the effect of <a name="line.34"></a>
<span class="sourceLineNo">035</span>     * triggering the Event once whenever the key is invoked.<a name="line.35"></a>
<span class="sourceLineNo">036</span>     * <a name="line.36"></a>
<span class="sourceLineNo">037</span>     * @param event the Event to be added to the ListenerManager<a name="line.37"></a>
<span class="sourceLineNo">038</span>     * @param key   the integer key with which the Event should be associated<a name="line.38"></a>
<span class="sourceLineNo">039</span>     */<a name="line.39"></a>
<span class="sourceLineNo">040</span>    public static void addListener(Event event, int key) {<a name="line.40"></a>
<span class="sourceLineNo">041</span>        verifyNoDuplicate(event, key);<a name="line.41"></a>
<span class="sourceLineNo">042</span>        ListenerManager.eventList.addElement(event);<a name="line.42"></a>
<span class="sourceLineNo">043</span>        ListenerManager.keyList.addElement(new Integer(key));<a name="line.43"></a>
<span class="sourceLineNo">044</span>    }<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>    /**<a name="line.46"></a>
<span class="sourceLineNo">047</span>     * Calls all Events associated with the given key. The Events will be run <a name="line.47"></a>
<span class="sourceLineNo">048</span>     * once. They will be kept in the ListenerManager's index.<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * <a name="line.49"></a>
<span class="sourceLineNo">050</span>     * @param key the String key whose associated Events should be run<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public static void callListener(String key) {<a name="line.52"></a>
<span class="sourceLineNo">053</span>        DebugLog.log(DebugLog.LVL_STREAM, "ListenerManager", "Called key " + key + "; forwarded...");<a name="line.53"></a>
<span class="sourceLineNo">054</span>        callListener(key.hashCode());<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span>    <a name="line.56"></a>
<span class="sourceLineNo">057</span>    /**<a name="line.57"></a>
<span class="sourceLineNo">058</span>     * Calls all Events associated with the given key. The Events will be run <a name="line.58"></a>
<span class="sourceLineNo">059</span>     * once. They will be kept in the ListenerManager's index.<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * <a name="line.60"></a>
<span class="sourceLineNo">061</span>     * @param key the integer key whose associated Events should be run<a name="line.61"></a>
<span class="sourceLineNo">062</span>     */<a name="line.62"></a>
<span class="sourceLineNo">063</span>    public static void callListener(int key) {<a name="line.63"></a>
<span class="sourceLineNo">064</span>        DebugLog.log(DebugLog.LVL_STREAM, "ListenerManager", "Called key " + key);<a name="line.64"></a>
<span class="sourceLineNo">065</span>        for(int i = 0; i &lt; ListenerManager.keyList.size(); i++) {<a name="line.65"></a>
<span class="sourceLineNo">066</span>            if(((Integer) ListenerManager.keyList.elementAt(i)).intValue() == key) {<a name="line.66"></a>
<span class="sourceLineNo">067</span>                try {<a name="line.67"></a>
<span class="sourceLineNo">068</span>                    ((Event) ListenerManager.eventList.elementAt(i)).registerSingleEvent();<a name="line.68"></a>
<span class="sourceLineNo">069</span>                } catch(Exception e) {<a name="line.69"></a>
<span class="sourceLineNo">070</span>                    e.printStackTrace();<a name="line.70"></a>
<span class="sourceLineNo">071</span>                    ListenerManager.eventList.removeElementAt(i);<a name="line.71"></a>
<span class="sourceLineNo">072</span>                    ListenerManager.keyList.removeElementAt(i);<a name="line.72"></a>
<span class="sourceLineNo">073</span>                    DebugLog.log(DebugLog.LVL_ERROR, ((Event) ListenerManager.eventList.elementAt(i)).toString(), "Error in Listener event: " + e.getMessage());<a name="line.73"></a>
<span class="sourceLineNo">074</span>                }<a name="line.74"></a>
<span class="sourceLineNo">075</span>            }<a name="line.75"></a>
<span class="sourceLineNo">076</span>        }<a name="line.76"></a>
<span class="sourceLineNo">077</span>    }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>    /**<a name="line.79"></a>
<span class="sourceLineNo">080</span>     * Removes all Event/key pairs from the Listener table whose Event <a name="line.80"></a>
<span class="sourceLineNo">081</span>     * matches the one provided. This Event will no longer be called until <a name="line.81"></a>
<span class="sourceLineNo">082</span>     * it is re-added.<a name="line.82"></a>
<span class="sourceLineNo">083</span>     * <a name="line.83"></a>
<span class="sourceLineNo">084</span>     * @param event The Event to be dropped <a name="line.84"></a>
<span class="sourceLineNo">085</span>     */<a name="line.85"></a>
<span class="sourceLineNo">086</span>    public static void dropEvent(Event event) {<a name="line.86"></a>
<span class="sourceLineNo">087</span>        int n = 0;<a name="line.87"></a>
<span class="sourceLineNo">088</span>        while(n != -1) {<a name="line.88"></a>
<span class="sourceLineNo">089</span>            n = ListenerManager.eventList.lastIndexOf(event);<a name="line.89"></a>
<span class="sourceLineNo">090</span>            if(n == -1) break;<a name="line.90"></a>
<span class="sourceLineNo">091</span>            ListenerManager.eventList.removeElementAt(n);<a name="line.91"></a>
<span class="sourceLineNo">092</span>            ListenerManager.keyList.removeElementAt(n);<a name="line.92"></a>
<span class="sourceLineNo">093</span>            DebugLog.log(DebugLog.LVL_DEBUG, "ListenerManager", "Listener key number " + n + " sliced from event " + event.toString());<a name="line.93"></a>
<span class="sourceLineNo">094</span>        }<a name="line.94"></a>
<span class="sourceLineNo">095</span>    }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>    /**<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * Removes all Event/key pairs from the listener table whose class type is<a name="line.98"></a>
<span class="sourceLineNo">099</span>     * of the one provided. This is considerably slower than dropping an Event,<a name="line.99"></a>
<span class="sourceLineNo">100</span>     * so should be used sparingly.<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * <a name="line.101"></a>
<span class="sourceLineNo">102</span>     * @param c The class to be dropped.<a name="line.102"></a>
<span class="sourceLineNo">103</span>     */<a name="line.103"></a>
<span class="sourceLineNo">104</span>    public static void dropEventType(Class c) {<a name="line.104"></a>
<span class="sourceLineNo">105</span>        for(int i = 0; i &lt; ListenerManager.eventList.size(); i++)<a name="line.105"></a>
<span class="sourceLineNo">106</span>            if(((Event)ListenerManager.eventList.elementAt(i)).getClass().equals(c)) {<a name="line.106"></a>
<span class="sourceLineNo">107</span>                ListenerManager.dropEvent((Event)ListenerManager.eventList.elementAt(i));<a name="line.107"></a>
<span class="sourceLineNo">108</span>            }<a name="line.108"></a>
<span class="sourceLineNo">109</span>        DebugLog.log(DebugLog.LVL_INFO, "ListenerManager", "Dropping event class " + c.getName());<a name="line.109"></a>
<span class="sourceLineNo">110</span>    }<a name="line.110"></a>
<span class="sourceLineNo">111</span><a name="line.111"></a>
<span class="sourceLineNo">112</span>    /**<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * Drops all Event/key pairs with the given key.<a name="line.113"></a>
<span class="sourceLineNo">114</span>     * <a name="line.114"></a>
<span class="sourceLineNo">115</span>     * @param key the String key to be dropped from the table.<a name="line.115"></a>
<span class="sourceLineNo">116</span>     */<a name="line.116"></a>
<span class="sourceLineNo">117</span>    public static void dropListener(String key) {ListenerManager.dropListener(key.hashCode());}<a name="line.117"></a>
<span class="sourceLineNo">118</span>    <a name="line.118"></a>
<span class="sourceLineNo">119</span>    /**<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * Drops all Event/key pairs with the given key.<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * <a name="line.121"></a>
<span class="sourceLineNo">122</span>     * @param key the integer key to be dropped from the table.<a name="line.122"></a>
<span class="sourceLineNo">123</span>     */<a name="line.123"></a>
<span class="sourceLineNo">124</span>    public static void dropListener(int key) {<a name="line.124"></a>
<span class="sourceLineNo">125</span>        DebugLog.log(DebugLog.LVL_INFO, "ListenerManager", "Dropping key " + key);<a name="line.125"></a>
<span class="sourceLineNo">126</span>        for(int i = 0; i &lt; ListenerManager.keyList.size(); i++) {<a name="line.126"></a>
<span class="sourceLineNo">127</span>            if(i &gt; ListenerManager.keyList.size()) return;<a name="line.127"></a>
<span class="sourceLineNo">128</span>            if(((Integer)ListenerManager.keyList.elementAt(i)).intValue() == key) {<a name="line.128"></a>
<span class="sourceLineNo">129</span>                DebugLog.log(DebugLog.LVL_DEBUG, "ListenerManager", "Listener dropped: " + ListenerManager.eventList.elementAt(i).getClass().getName() + " ("+key+").");<a name="line.129"></a>
<span class="sourceLineNo">130</span>                ListenerManager.eventList.removeElementAt(i);<a name="line.130"></a>
<span class="sourceLineNo">131</span>                ListenerManager.keyList.removeElementAt(i);<a name="line.131"></a>
<span class="sourceLineNo">132</span>            }<a name="line.132"></a>
<span class="sourceLineNo">133</span>        }<a name="line.133"></a>
<span class="sourceLineNo">134</span>    }<a name="line.134"></a>
<span class="sourceLineNo">135</span><a name="line.135"></a>
<span class="sourceLineNo">136</span>    /**<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * Clears the entire Listener table.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     */<a name="line.138"></a>
<span class="sourceLineNo">139</span>    public static void dropAllListeners() {<a name="line.139"></a>
<span class="sourceLineNo">140</span>        DebugLog.log(DebugLog.LVL_INFO, "ListenerManager", "Dropped ALL " + ListenerManager.eventList.size() + " listeners.");<a name="line.140"></a>
<span class="sourceLineNo">141</span>        ListenerManager.eventList.removeAllElements();<a name="line.141"></a>
<span class="sourceLineNo">142</span>        ListenerManager.keyList.removeAllElements();<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span>    <a name="line.144"></a>
<span class="sourceLineNo">145</span>    private ListenerManager() {}<a name="line.145"></a>
<span class="sourceLineNo">146</span>}<a name="line.146"></a>




























































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